Dr Tung's Smart Floss 30 yds
Lower concern. Nylon filament is not a material linked to PFAS.
Dental floss is a low-concern product category. The material as recorded, nylon floss filament, is not associated with PFAS. The brand has no PFAS statement on record.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Nylon floss filament
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Dr Tung's Smart Floss 30 yds is made of, ingredients and materials
Dr Tung's Smart Floss is a nylon-filament dental floss, a synthetic polymer that does not inherently contain PFAS or other persistent fluorinated compounds. Nylon is chemically stable in the mouth and does not leach harmful substances during normal use. The 30-yard spool format minimizes packaging waste compared to dispensers with plastic cartridges.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Gum irritation or sensitization from filament design
Frayed or poorly maintained floss can mechanically irritate gums, but this is user-dependent maintenance and not a product defect. Dr Tung's floss is reported to be smooth and gentle-edged by users, with no pattern of irritation complaints.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Microplastic shedding from nylon filament
Nylon floss does not shed microplastics during normal flossing because the filament is designed to remain intact and is not heated. Breakage or fraying is mechanical, not chemical, and releases only macroscopic fiber fragments.
Dye or colorant toxicity
No published data or incidents link Dr Tung's floss coloring to oral irritation or systemic exposure. Dyes used in dental floss are typically food-grade and applied in trace amounts.
Nylon leaching into saliva
Nylon is chemically inert under mouth temperature and pH conditions; no established mechanism exists for hazardous leaching during normal use. Saliva does not degrade or dissolve nylon filament.
Heavy metals
No recalls, test results, or regulatory warnings document heavy metal or formaldehyde contamination in Dr Tung's floss. This hazard class is not documented for premium nylon floss products.
Source, FDA ↗How is this PFAS grade calculated?
The brand's record and disclosure
Dr Tung's (owned by Gently) operates under a transparency-focused brand ethos, publishing ingredient lists and sourcing information on products. No recalls, safety warnings, or chemical controversies are on record for this floss product. The company does not publicly advertise PFAS avoidance, but nylon as a base material is not associated with PFAS by chemical composition.
How it compares in its category
Most dental floss is made from nylon or expanded polytetrafluoroethylene (Teflon-type coating), both of which carry minimal hazard profiles when used as designed. Dr Tung's nylon formulation avoids Teflon-type coating altogether, which eliminates theoretical Teflon-type coating-shedding concerns in heavy users. Silk floss alternatives exist but are more expensive and offer no documented safety advantage.
If you buy it
Store in a cool, dry place away from direct sunlight to prevent nylon degradation. Floss does not require special care or maintenance; discard and replace the spool after the filament is depleted or fraying begins. Use once daily in standard flossing motions; nylon is durable and does not shed microfibers under normal oral use.
What is not known about PFAS in this product?
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Dr. Tung's has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Dr Tung's Smart Floss 30 yds?
- Plant-based waxed fiber floss
- A third party reports verifying it as PFAS-free
- Fragrance allergens and sensitizers
- nylon monofilament
- The brand calls it PFAS-free, which we have not verified
- Microplastics
2 hazards checked on this product, all on its full breakdown.
- Coconut fiber-based floss
- The brand calls it PFAS-free, which we have not verified
- Microbial growth in natural fiber storage
More dental floss grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.